From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D68E9CA9EC4 for ; Wed, 30 Oct 2019 01:58:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B565220874 for ; Wed, 30 Oct 2019 01:58:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726287AbfJ3B6q (ORCPT ); Tue, 29 Oct 2019 21:58:46 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:5221 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726108AbfJ3B6p (ORCPT ); Tue, 29 Oct 2019 21:58:45 -0400 Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id BACE7FFFD70AD4B8F000; Wed, 30 Oct 2019 09:58:41 +0800 (CST) Received: from [127.0.0.1] (10.74.191.121) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.439.0; Wed, 30 Oct 2019 09:58:41 +0800 Subject: Re: [PATCH v6] numa: make node_to_cpumask_map() NUMA_NO_NODE aware To: Michal Hocko CC: Greg KH , Peter Zijlstra , Robin Murphy , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , "Rafael J. Wysocki" , , References: <20190925104108.GE4553@hirez.programming.kicks-ass.net> <47fa4cee-8528-7c23-c7de-7be1b65aa2ae@huawei.com> <20191010073212.GB18412@dhcp22.suse.cz> <6cc94f9b-0d79-93a8-5ec2-4f6c21639268@huawei.com> <20191011111539.GX2311@hirez.programming.kicks-ass.net> <7fad58d6-5126-e8b8-a7d8-a91814da53ba@huawei.com> <20191012074014.GA2037204@kroah.com> <1ec704df-97a5-04b7-1f20-8e3db19440a3@huawei.com> <20191029085336.GF31513@dhcp22.suse.cz> From: Yunsheng Lin Message-ID: <6c822a7d-499a-a031-5f67-848f590d5257@huawei.com> Date: Wed, 30 Oct 2019 09:58:40 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0 MIME-Version: 1.0 In-Reply-To: <20191029085336.GF31513@dhcp22.suse.cz> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.74.191.121] X-CFilter-Loop: Reflected Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org On 2019/10/29 16:53, Michal Hocko wrote: > On Mon 28-10-19 17:20:33, Yunsheng Lin wrote: >> On 2019/10/12 15:40, Greg KH wrote: >>> On Sat, Oct 12, 2019 at 02:17:26PM +0800, Yunsheng Lin wrote: >>>> add pci and acpi maintainer >>>> cc linux-pci@vger.kernel.org and linux-acpi@vger.kernel.org >>>> >>>> On 2019/10/11 19:15, Peter Zijlstra wrote: >>>>> On Fri, Oct 11, 2019 at 11:27:54AM +0800, Yunsheng Lin wrote: >>>>>> But I failed to see why the above is related to making node_to_cpumask_map() >>>>>> NUMA_NO_NODE aware? >>>>> >>>>> Your initial bug is for hns3, which is a PCI device, which really _MUST_ >>>>> have a node assigned. >>>>> >>>>> It not having one, is a straight up bug. We must not silently accept >>>>> NO_NODE there, ever. >>>>> >>>> >>>> I suppose you mean reporting a lack of affinity when the node of a pcie >>>> device is not set by "not silently accept NO_NODE". >>> >>> If the firmware of a pci device does not provide the node information, >>> then yes, warn about that. >>> >>>> As Greg has asked about in [1]: >>>> what is a user to do when the user sees the kernel reporting that? >>>> >>>> We may tell user to contact their vendor for info or updates about >>>> that when they do not know about their system well enough, but their >>>> vendor may get away with this by quoting ACPI spec as the spec >>>> considering this optional. Should the user believe this is indeed a >>>> fw bug or a misreport from the kernel? >>> >>> Say it is a firmware bug, if it is a firmware bug, that's simple. >>> >>>> If this kind of reporting is common pratice and will not cause any >>>> misunderstanding, then maybe we can report that. >>> >>> Yes, please do so, that's the only way those boxes are ever going to get >>> fixed. And go add the test to the "firmware testing" tool that is based >>> on Linux that Intel has somewhere, to give vendors a chance to fix this >>> before they ship hardware. >>> >>> This shouldn't be a big deal, we warn of other hardware bugs all the >>> time. >> >> Hi, all. >> >> The warning for the above case has been added in [1]. >> >> So maybe it makes sense to make node_to_cpumask_map() NUMA_NO_NODE aware >> now? >> >> If Yes, this patch still can be applied to the latest linus' tree cleanly, >> Do I need to resend it? >> > > By this patch you mean http://lkml.kernel.org/r/1568724534-146242-1-git-send-email-linyunsheng@huawei.com > right? Yes. > > I would just resend it unless there is still a clear disagreement over > it. Ok, thanks. Will resend it to see if there is still a disagreement over it. > >> [1] https://lore.kernel.org/linux-pci/1571467543-26125-1-git-send-email-linyunsheng@huawei.com/ >